On Aug 16, 2009, at 6:40 PM, der Mouse wrote:
As page sizes increase, we also need to deal with subpage uareas.Why? Is it really worth recovering the rest of the page containing theuarea? While there certainly are machines so small that that much memory is worth thinking about, I'm inclined to doubt that that occurs together with pages big enough that a subpage uarea is an issue.
Well, mips can now have 16KB pages and USPACE used to be 8KB so I can put two uareas per page now. And I can see going to 32KB or 64KB pages if you have 16+GB of ram. The situation is closer than you think.